I know ive seen a thread like this SOMEWHERE but i couldnt find it when i just tried searching. Last night when i went to bed my charge in my battery was 41%, i put the macbook to SLEEP (not off) and when i woke p this morning my battery was down to 38%. Is this anything to worry about or is that about normal drainage for roughly 8 hours of sleeping? Sorry to be worrying about little things but i just had my battery replaced from apple because my original was only giving me MAYBE 2hours on a full charge. Thanks for the help!